Improvement in machines for rolling metals



A. C. STNE. Machine forAV Rdlling Metal.

No. 56,825. 'n Patented July 31, 1866.

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N. PETERi Phewumagnplwr. washi nnnnnnn C PATENT OFFICE9 A. C. STONE, OF STEELEVILLE, PENNSYLVANIA.

" IMPROVEMENT IN MACHINES FOR ROLLING MET'ALS.

Specication forming part of Letters Patent No. 56,825, dated JulySl, 1866.

To all whom it may concern:

Be it known that I, A. G. STONE., of Steeleville, in the county of Lancaster and State of Pennsylvania, have invented a new and Improved Roll for Rolling Metals Tapering; and I do hereby declare that the following is a full and exact description thereof, reference being had to the annexed drawings, making a part of this speciiication, in which- Figure l is a perspective view; Fig. 2, a perspective View of the rolls, showing the tapering grooves in them, &c.

The nature of my invention consists in forming tapering grooves 'in the ordinary rollingmill rolls, and in placing in front of said grooves a movable die, through which the heated rod is made to pass before it enters the groove in the rolls. The diameter of the metal being thus gradually decreased by the dies, the tinning, which would otherwise be left on the rod by the action of the rolls alone, is prevented.

To enable others "skilled in the art to makeA and use my improvement, I will proceed to describe its construction and operation.

Into an ordinary rolling-mill housing for the reception of rolls, as represented by the letters A B B, Ivig. l, I place two rolls constructed as follows: These rolls G G are made so that their circumference shall correspond with the length of the piece to be tapered, and are geared together by means of lthe wheels I I. The upper roll is securely pressed against the lower by meansof the screws b b, and put in motion by either a crank, as at E, or a pulley. In the center of each roll I form a tapering groove, as seen at c c, Fig. 2. This groove passes round the roll, decreasing in diameter until it arrives at the starting-point, and is either a Yhalf-circle or the one-half of any other desired shape which I may require my tapered piece to be when rolled. When the rolls thus grooved are placed together and started from the same point, it is evident that any piece of metal placed between them and capable of being drawn out must be tapered for a distance corresponding to the circumference of the rolls, and receive a shape either round, oval, or triangular, depending on the shape of the grooves in the rolls.

Now, as experience has shown that when a piece of metal is required to be drawn beyond a certain limit between a pair of rolls fins will necessarily be left on each side of the piece,

and as the required taper in some pieces may go beyond that limit, I have provided against iinning in my improvement by the following device:

I place in front of my rolls and exactly opposite the grooves two dies, D D, one of which is stationary, the other movable. The movable die D d is pressed against the other by means of the eccentric F on the shaft G, and driven bythe wheel It', which wheel being the same size with the wheels onthe rolls, this eccentric makes the same revolutions as the rolls. The die D d is brought back by the spring s. When the largest part of the grooves in the rolls is at the point where they receive the rod to be tapered, then the opening between the dies is at its greatest capacit-y. This is the starting-point. It is therefore evident from the foregoing description that if a heated rod of metal be now placed between thedies D D and the rollers set in motion the movable die D d, will gradually close on said rod as the diameter of the grooves in the rolls decrease until a complete revolution of the rolls has taken place, when said die, liberated by the eccentric and brought back by the spring s, will again open to its greatest limit for another operation.

I do not make any claim to rolling-mill rolls as such; but

What I do claim as my invention, and wish to secure by Letters Patent, is-

The combination of the dies D D with the rolls C C, constructed and operating as de scribed, and for the purposes already set forth..

A. C. STONE.

Witnesses:

" T. J. MARSH,

B. F. MARSH. 

